tatra -- there; ekah -- one; purushah -- person; rajan -- O King (Parikshit); agatah -- did come; apurva -- never before; darsanah -- whose appearance; vijnapitah -- announced; bhagavate -- to the Supreme Lord; pratiharaih -- by the doorkeepers; pravesitah -- made to enter.

Once a certain person arrived in the assembly, O King, who had never been seen there before. The doorkeepers announced him to the Lord and then escorted him inside.